Process for producing smooth glossy, or glazed coating on cement goods.



trimmer mama-em n m r e as Ba manarc ma. was.teammates AL EMENI- 65 c NoDrawing. f

Be a kn wn. t a r, lam-warms subject of the German, Em eror, and resid-jBaden, Germany, have invehted new and useful Process for Producing a-Smooth,

' Glossy, orGlaaed Coatihg on Cement Goods-,

Walls, aud'the' is a specification. I, W

When cement or cement m xtures or mo rtar is applied in a fluidcondition to the dry and porous surface of cement, or to adry wall orother object, the absorption ofthc moisture by the -'surfafce to whichapplied, together with the removal of the moisture by evaporation intothe surroundingatmosphere, results in-a dull, rough, uneven, andunsatisfactory surface, requiring furthertreatment', by; spattling,fixing tar-polishing, before a smooth,glossy or glazed-surface can beobtained, v p

As a specific example of the method of performing the invention hereinone proceeds as follows: A neat Portland cement mortar, having theconsistency of .an oil Varnish, although obviously no oil isincorporated in the said coating IniXture,'1s applied to 'the surface ofthe article or construction to. be treated by means of asuitablespraying device, the surface being maintained moist throughoutthe application of thejcoatingthereon and until the initial set hasoccurred. In this manner, owing to the [fact that the coating is sprayedor forced -upon the said surface by means of pressure,

an extremely dense and even coating is obvtained. Preferably the saidcoating is kept moist continuously until the initial set has occurredeither by the direct application of water or by maintaining the same ina saturated atmosphere. As a result of this treatment a glazed likeluster is imparted to the surface and the entire body of the coatingitself is extremely uniform and even. 7 Moreover, the luster or glazepersists and remains after the process of setting is completelyfinished, and thereby subsequent smoothening, flattening, or polishingis rendered .entirely unnecessary. I a

The coveringma'terial may, with advantage have a consistency .ofabout-that of oil color. It contains as an essential ingredient cement,which maybe. admixed with other like, 1* :whichthefollowing 1' Y 1 am,wi -wrin m tt r to coloredsurfacefl diluent's, etc. the process} thepresent invention the" ap Cllyllllg or hardening or setting henpresence" of the oistenedsurfacev to .r ds a W ll s h sedine'a m srftheeXtern'al layer of the tained'. Ap licant disclaims, not bein withinithe s r t the n x dde ms tie m r separatespraying of a' mortar upon asur -separate meistening or saturating of a mass of cement mortarapplied to a wall, as by sired result herein obtained be accomplished,and it is solely by thecombination of the sufficiently moist until theinitial sethas occurred to preserve a superficial gloss on the saidsurface layer when completely set and hardened.

2. The process for producing a glazed-like mortar coating on the surfaceof a cement construction which consists in pneumatically applyingasuperficial coating'ofliquid cement mortar to the surface to be treatedin order to form thereon a dense surface layer which resists .thepenetration" of moisture therethrough to the underlying base, and

*mortar sufficiently moist untiltljie initial set materials'to give asurface of a particular give a .g iitt el' me app cement while theunderneath layers are still =moist, so-thatunevennesses areavoided, anda-smoot h andglossy or glazed surfacejs'obhas occurred to preserve asuperficial gloss face to form a coatingthereon, or the mere 1 neitherofthese processes alone can the depressure application or sprayingofa'cement taining said surface layer of cement mortar maintaining saidsurface layer of cement penetration of moisture .therethrough to the onthe said surface layer. when completely set and hardened.

8. T he prccess for producing a glazedlike mortar coating on the surfaceof a suitable base which consists in first moistening said surface andthen pneumatically applying a superficial coating of liquid cementmortar to the surface to be treated, in order to form thereon a densesurface layer which resists the penetration of moisture therethrough tothe underlying base, and maintaining said surface layer of cement mortarsutliciently moist until. the initial set hasoccurred to preserve asuperficial gloss on the said surface layer when completely set andhardened.

4-. The process for producing a glazed-like mortar coating on thesurface of a cement eonstrnction which consists in first moistening thesurface of said cement construction and then pneumatically applying asuperficial coating of liquid cement mortar to the surface to be treatedin order to form thereon a dense surface layer which resists theunderlying base, and maintaining said surface layer of cement mortarsutficiently molst until the initial set has occurred to preserve asuperficial gloss on the said surface layer when completely setandhardened,

5. The process which consists in causing a pneumatically propelled bodyof liquid cement mortar to impinge against the m'ois.

6. The process which consists in causing a, pneumatically propelled bodyof liquid cement mortar to impinge against the moistened surface of asuitable cement construction, and preventing the evaporation of thevehicle of said mortar until the initial set of the same has occurred,whereby a dense, lustrous coating is formed on said construction. a

In testimony whereof I affix my signature in presence of two witnesses.

, ANTON WEITHALER.

Witnesses:

.Enuns'r L. Ives,

W. Somu z, n

